HENRYVILLE, Ind. - Powerful storms leveled small towns in southern Indiana, transforming entire blocks of homes into piles of debris, tossing school buses into a home and a restaurant and causing destruction so severe it was difficult to tell what was once there. As night fell, dazed residents shuffled through town, some looking for relatives, while rescue workers searched the rubble for survivors. Without power, the only light in town came from cars that crawled down the streets.

From the Gulf Coast to the Great Lakes, the storms touched nearly all walks of life. A fire station was flattened. Roofs were ripped off schools. A prison fence was knocked down and scores of homes and businesses were destroyed. At least 20 people were killed, including 14 in Indiana, and dozens of others were hurt in the second deadly tornado outbreak this week.

It wasn't immediately clear how many people were missing.

The threat of tornadoes was expected to last until late Friday for parts of Kentucky, Tennessee, Indiana and Ohio. Forecasters at the National Weather Service's Storm Prediction Center said the massive band of storms put 10 million people at high risk of dangerous weather.

'We knew this was coming. We were watching the weather like everyone else,' said Clark County, Ind., Sheriff Danny Rodden. 'This was the worst case scenario. There's no way you can prepare for something like this.'
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